Limestone and water are usually involved.
Sinkholes and caverns are formed from carbolic acid. This carbolic acid dissolves rock which creates the spaces that form the sinkholes and caverns. The carbolic acid is created when carbon dioxide dissolves in water.
According to their official website, the company named Vulcan Materials mainly produce construction materials. These include, but are not limited to: Asphalts, concrete, cement, railroad ballast, agricultural materials and chemical materials.
Carlsbad Caverns.
Linville Caverns Linville Caverns are limestone caverns located near Linville Falls in North Carolina. It is an example of a limestone cave similar to a number of others.
Caverns can be under water and underground.
Caverns of Minos happened in 2012.
Carlsbad Caverns is located in New Mexico.
Caverns of Xaskazien happened in 1995.
Caverns of Xaskazien was created in 1995.
Caverns of Zoarre happened in 1984.
Caverns of Zoarre was created in 1984.
Caverns of Mars was created in 1981.